1
PSB-12V3A
PSB 13,8V/3A enclosed switch
mode buffer power supply
Edition: 1 from 28.04.2020
Supercedes the edition: ------------
EN
Features of the power supply:
DC 13,8 V/3 A uninterruptible power supply
high efficiency 87%
controlling of battery charging and maintaining
protecting of battery against excessive discharging
(UVP)
battery charging current 0,5 A
optional equipment: set of external LED indicators:
PKAZ168, mounting plate DIN1
battery output is full protected against short-
circuit and reverse connection
LED optical signalisation
protections:
short-circuit protection SCP
over voltage protection OVP
surge protection
overload protection OLP
warranty
– 2 year from the production date
1. Technical description.
1.1. General description.
Buffer-type power supply units are intended for continuous power supply to devices that require stabilised voltage
of
12 V DC (+/-15%).
The power supply provides a voltage of
U=13,8 V DC
with an output current of:
Output current of 3 A + 0,5 A battery charging
In case of power voltage decay, prompt switching to battery supply occurs. The power supply unit is protected
against a short circuit, an overload, a surge or over voltage protection.
1.2. Technical parameters.
Supply voltage
~ 200
– 240 V; 0,5 A; 50/60 Hz
Inrush current
40 A
Supply power
48 W
Efficiency
87%
Output voltage (factory settings)
11-13,8 V DC
– buffer operation
9,5-13,8 V DC
– battery operation
Output current
3,5 A
Battery charging current
0,5 A
Voltage adjustment range
13,5
– 14,4 V DC
Current consumption by PSU during battery-
assisted operation
approx. 35 mA
Ripple voltage
100mV p-p max.
Short-circuit protection SCP
electronic, automatic recovery
Overload protection OLP
105-150% PSU power, automatically recovered
Overload protection (battery) OLP
polymer fuse
Surge protection
varistors
Overvoltage protection OVP
>19 V (activation requires disconnecting the load or supply
for about approx. 1 min)
Excessive discharge protection UVP
U<9,5 V (
± 5%) – disconnection of battery
Optical signalisation
LED green
– indicates DC voltage at the power
LED optical indication output (intended for optional
indication set PKAZ168)
LED AC
– presence of AC voltage
LED DC
– presence of DC voltage on power supply output
LED CHARGE
– battery charging process
Optional equipment
A set for optical indication LED PKAZ168
Operation conditions
2-nd enviromental class, temperature: -10
o
C÷40
o
C
relative humidity 20%...90%, without condensation
Dimensions
L=110, W= 78, H=36 [
±2mm]
Net/gross weight
0,25 / 0,27 [kg]